Flying-machine.



A. ALLAN. FLYING MACHINE. APPLICATION mgo AUG. 14. 1911.

Patented Apr. 30, 1918.

T It.

Annanw ALLAN, or LEITI-I, SCOTLAND.

FLYING-MACHINE.

T all'whom it may concern Be it known that 1, ANDREW ALLAN, a.

I subject of the King of Great Britain and following is a specification.

This invention relates to flying machines and refers to constructional improvements in aeroplanes, hydroplanes and the like by which the lifting power and general cf.- ficiency of the machines are increased.

The invention refers more particularly to machines of the type in question provided with tractors or screws placed at or near the front.

According to the general principle ofmy invention the screw or tractor is-placed in an inclined position'under the plane or upper plane, and above a curved structure open in front and closed behind, which structure ll call the scoop, the intention being that the air acted upon by the tractor shall be thrown against the plane "above, thus imparting a lifting impulse to the machine. A further lifting impulse, and also a propelling effect, are imparted by the partial exhaustion of the air inside the scoop, and the consequent pressure of the atmospheric air on the bottom and end of the\ scoop.

In order that my said invention may be clearly understood ll will now proceed to describe the same with reference to the accompanying drawings .which show, die-- siti-on of'the engine and car.

Fig. 3 is an end elevation.

The same letters of reference are employed to denote the same parts in all the views.

Referring to Fig. 1, the-side planes or.

- wings a, a, are of any ordinary construction, and may be cambered in the usual way and provided with ailerons 02?, as shown, at Fig.2 for the purpose of banking and steeringthe machine laterally.

- Thecentral plane 6 may be curved. in cross section, or plane, and it may be rela- Specification of Letters Patent.

I Patented Apr. 30, little.

Application filed August 14, 1917. Serial No. 186,250.

tively longer, shorter, narrower or broader than shown in the drawing.

A vertical rudder 70, Fig. 2, is provided under the rudder 0 for horizontal steering purposes.

ner by the framework 9.

As will be seen, when the tractor revolves the air is thrown up against the underside of the plane Z), and at the same time the air is partially exhausted in the scoop it. In this way the tractor while pulling the machine forward, exerts a lifting impulse by .the pressure of the air on the plane I),- and 4 In Figs, 2 and 3, the tractor e is actuated by an engine f carried 1n any suitable manindirectly by the exhaustion of the air in the scoop h, andthe pressure of the air below.

There is also a propelling effect exerted on the end j of the scoop by the pressure of the air behind.

The rudders 0 and is may be controlled by leversand wires or other appliances from the car Z which is attached to the frame work indicated by the dot and dash lines in Fig. 1 and the lines d in Figs. 1 and 2.

A landing chassis m, Figs. 2 and 3, with wheels or floats is provided attached below the scoop.

In a' modification of the construction, the engine may be placed below or behind the scoop, and may drive the screw shaft by means of a chain and (or) beveled gear.

A carifor the accommodation of passengeis and (or) the pilot and (or) an observer may be. arranged behind the scoop.

An auxiliary elevating rudder. may be arranged in front of the scoop or the front end of the longitudinal plane may be adapted to this purpose.

In the case oflarge machines two or more tractors and associated vidcd.

It will be understood that the invention is not limited to the particular way of carrying the same into efl'ect hereinbefore described but that the construction may be varied within the scope of the appended claims, without departing from the 'prin ciple of the said invention.

What I claim anddesire to secure by Letters Patent of the United States of America 1s:-

11. Inja flying .machine the combination of a plane,: a scoop like structure located below thesplane and having its open end parts may e proand an inclined tractor mounted between the plane and the scoop, for the purposes set forth.

' 2. In a flying machine the combination of a plane, a curved scoop like structure located below the plane and having its open end directed forwardly and its closed end rearwardly with respect to the flying machine; and an inclined tractor mounted be tween the plane and the scoop substantially as and for the purposes set forth.

3. In a flying machine the combination of a plane, 'a curved scoop like structure located below the plane and having its open end directed forwardly and itsvclosed-end rearwardly with respect to the flying machine, and an inclined tractor mounted between the plane and scoop, the said tractor rotating in a plane inclined forwardly and upwardly with respect to the vertical axis of the machine, substantially as described.

4. In a flying machine, the combination of a main plane, side planes, a curved scoop like structure located below the main plane,

scoop, the said tractor rotating in a plane inclined forwardly and upwardly with respect to the vertical -axis of the machine, substantially as described.

In testimony wherepf, I aflix my signature this 2nd day of August 1917.

' ANDREW ALLAN.

Signed in presence of HELEN SUTHERLAND,

FREDERICK PIATT. 

